Improvement in tuyeres



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' t Latem Patent No. 77,178, dated .Apre 28, 1868.

IMPRQVBMENT IN TUYERES.

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TO ALL WHOM ITMAY CONOERN:

Beit known that I, LEWIS DQNNELL, a citizeuof Columbus, Ohio, have invented a new and useful '.lfuyere- I ron; -and I do hereby declare that thel following is a clear, full, and exact description of the 4construction and operation of 'the same, reference being had' to the annexed drawings, mailingsl Part ,of this specification,

in which- 4 Figure I is a'perspective view ofthe whole tuyere-iron.

Figure II is a sectional view. l Figure III is a-vew of -the revolving top, with its slots; Figure IV represents the bottom valve open. y The nature of my invention consists in -su 'easy vmode of regulating the draught, securing an intense heat on the spot to be heated withoutshifting the iron about in the fire, and of relieving the tuyere-iron of cinders' 'and-dirt;

lTo'enable lothers skilled in the art to make and use myinvention, I will proceedto describe its construction and operation, v

Iconstruct my tuyere-iron with a revolving top, A,'so that the slots B may be brought across or immediately under the metal to be heated, (Fig. III,) thus securing an intense heat on any required spot 'without shifting the position of the iron-to be heated.

l The lower or i'nner cylinder, J, ismade with a screw, p, at the point of contact, with'rthe upper 'or out cylinder, and this screw fits in a femalescrew, by which the lower cylinder is raised or lowered, thus increasing or diminishing the draught D, the air to be carried between the inner and the outer cylinders. The lower end of the inner cyliudcr,`J, is fitted with n closing-valve, O, worked with a bent lever, N, by 4which the cinders and dirt 4ennbe easily thrown from the cylinder. The lever or handle, N, also acts as the lever by which'to turn the lower cylinder in order to regulate the draught.

' Olaz'm.

What I claim as my invention, and-desire to secure by Letters Patent, is

A combination of the screwp with the revolving top- A, the'valve O, the cylinder C and J, and the handle or lever N, constructed and operated substantially as and for the'purpose se`t,forth.

LEWIS DONNELL. Witnesses:

TnoMAs E. TnYLoR, JOHN D. WELLS. 

